reduction

n.减少，缩减；(数学)约简

rediffusion, redirect, rediscover, redistribute, redistribution, redly, redness, redo, redolence, redolent, redouble, redoubt, redoubtable, redound, redress, redskin, reduce, reduce to, reducible, reductio ad absurdum, redundancy, redundant, redundantly, reduplicate, reduplication, redwood, reed, reediness, reedy, reef, reef-knot (US square-knot), reefer, reek, reel, reenact, reeve, reexamine, reexport, ref, reface,